CN109455095A - A kind of drive system of electric automobile and correlation technique and device - Google Patents

A kind of drive system of electric automobile and correlation technique and device Download PDF

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Publication number
CN109455095A
CN109455095A CN201811277427.0A CN201811277427A CN109455095A CN 109455095 A CN109455095 A CN 109455095A CN 201811277427 A CN201811277427 A CN 201811277427A CN 109455095 A CN109455095 A CN 109455095A
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CN
China
Prior art keywords
switch
alternating current
drive system
doubly
electric vehicle
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Pending
Application number
CN201811277427.0A
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Chinese (zh)
Inventor
陈思哲
徐梦然
张桂东
王裕
章云
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Guangdong University of Technology
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Guangdong University of Technology
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Priority to CN201811277427.0A priority Critical patent/CN109455095A/en
Publication of CN109455095A publication Critical patent/CN109455095A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/20—AC to AC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本申请公开了一种电动汽车驱动系统，其特征在于，包括：电池、转换模块、双馈电机以及控制模块；当双馈电机的转子连接电网时，控制模块，用于控制双馈电机从电网获取电网交流电，以便双馈电机对电网交流电进行降压处理得到降压交流电，转换模块，用于将降压交流电转换为直流电输送给电池，以便对电池充电。通过双馈电机实现对电网交流电的变压处理，然后通过转换模块将降压交流电转换为直流电，以便对电池进行充电，也就是通过双馈电机和转换模块实现了现有技术中充电桩的功能，使得电动汽车可以脱离充电桩对电池进行充电，提高电动汽车的适用度和充电的便利性。本申请还公开了一种电动汽车驱动系统的控制方法以及车辆，具有以上有益效果。

The present application discloses an electric vehicle drive system, which is characterized by comprising: a battery, a conversion module, a doubly-fed motor, and a control module; when the rotor of the doubly-fed motor is connected to the grid, the control module is used to control the doubly-fed motor from the grid. The AC power of the grid is obtained, so that the double-fed motor can perform step-down processing on the AC power of the power grid to obtain the step-down AC power. Transform the AC power of the grid through the doubly-fed motor, and then convert the step-down AC power into DC power through the conversion module to charge the battery. , so that the electric vehicle can be separated from the charging pile to charge the battery, which improves the applicability of the electric vehicle and the convenience of charging. The present application also discloses a control method for an electric vehicle drive system and a vehicle, which have the above beneficial effects.

Description

A kind of drive system of electric automobile and correlation technique and device
Technical field
This application involves electric vehicle engineering field, in particular to a kind of drive system of electric automobile, control method and Vehicle.
Background technique
With the continuous development of electric vehicle engineering, there is diversified electric vehicle engineering.But due to electronic The limitation of automobile batteries stored energy capacitance, cruise duration is shorter, needs on the way to charge to electric vehicle by charging pile in traveling. The prior art provides a kind of circuit structure to charge for charging pile, specifically passes through charging pile in charging for power grid Three-phase electricity be converted to direct current and charge the battery, correspondingly, the direct current of power grid is passed through while the car is driving Three-Phase PWM Converter is converted to alternating current, driving three-phase motor operation.
But charging pile must be relied on when charging in the prior art and charged, but the universal density of charging pile at present It is far from reaching requirement, user must travel and can may just find workable charging pile after a distance and charge, and make The charging link for obtaining current electric vehicle is inconvenient, and causes developing slowly for electric vehicle.
Therefore, convenience when how to improve electric car charging is the Important Problems of those skilled in the art's concern.
Summary of the invention
The purpose of the application is to provide a kind of drive system of electric automobile, control method and vehicle, passes through double feedback electric engine It realizes and the transformation of power grid alternating current is handled, direct current is then converted to for alternating current is depressured by conversion module, so as to electricity Pond is charged, that is, the function of charging pile in the prior art is realized by double feedback electric engine and conversion module, so that electronic Automobile can be detached from charging pile and charge the battery, and improve the relevance grade of electric car and the convenience of charging.
In order to solve the above technical problems, the application provides a kind of drive system of electric automobile, comprising: battery, conversion module, Double feedback electric engine and control module；
When the rotor of the double feedback electric engine connects power grid, the control module, for controlling the double feedback electric engine from institute It states power grid and obtains power grid alternating current, handle to obtain decompression exchange so that the double feedback electric engine carries out decompression to the power grid alternating current Electricity, the conversion module are conveyed to the battery for the decompression alternating current to be converted to direct current, so as to the battery Charging.
Optionally, when the drive system of electric automobile receives driving signal, the conversion module, being also used to will be electric The direct current in pond is converted to driving alternating current, and the control module is also used to control the rotor short-circuit of the double feedback electric engine, so as to The double feedback electric engine exchanges automobile described in electric drive by the driving.
Optionally, the control module include: controller, first switch, second switch, third switch, the 4th switch with And the 5th switch；
One end that the first end of the rotor is switched with one end of the first switch, the third respectively connects, described The second end of rotor respectively with the other end of the first switch, the second switch one end, it is described 4th switch one end Connection, the third end of the rotor are connected with one end of the other end of the second switch, the 5th switch respectively；Described Three switch the other end, it is described 4th switch the other end, it is described 5th switch the other end successively with the power grid first End, second end, the connection of third end；
The controller, for controlling institute when third switch, the 4th switch, the 5th switch disconnect State first switch and second switch closure；When third switch, the 4th switch, the described 5th close the switch, It controls the first switch and the second switch disconnects.
Optionally, the control module further includes mechanical device；The mechanical device, for turning when the double feedback electric engine The movable part that the double feedback electric engine is locked when son connection power grid, so that the double feedback electric engine obtains the power grid from the power grid Alternating current.
Optionally, the double feedback electric engine carries out decompression to the power grid alternating current and handles to obtain decompression alternating current, comprising:
The double feedback electric engine is filtered the power grid alternating current and transformation handles to obtain the decompression alternating current.
Optionally, the conversion module is Three-Phase PWM Converter.
Optionally, the conversion module is rectification adverser.
Optionally, the switch is relay.
The application also provides a kind of control method of drive system of electric automobile, is applied to electric car as described above and drives Dynamic system；
The control method, comprising:
When the drive system of electric automobile receives driving signal, the conversion module is by the direct current of the battery Driving alternating current is converted to, the control module controls the rotor short-circuit of the double feedback electric engine, so that the double feedback electric engine passes through Automobile described in the driving exchange electric drive；
When the rotor of the double feedback electric engine connects power grid, the control module controls the double feedback electric engine from the power grid Power grid alternating current is obtained, handles to obtain decompression alternating current, institute so that the double feedback electric engine carries out decompression to the power grid alternating current It states conversion module the decompression alternating current is converted into direct current and be conveyed to the battery, to charge to the battery.
The application also provides a kind of vehicle, including drive system of electric automobile as described above.
A kind of drive system of electric automobile provided herein characterized by comprising battery, conversion module, double-fed Motor and control module；When the rotor of the double feedback electric engine connects power grid, the control module, for controlling the double-fed Motor obtains power grid alternating current from the power grid, handles to obtain so that the double feedback electric engine carries out decompression to the power grid alternating current It is depressured alternating current, the conversion module is conveyed to the battery for the decompression alternating current to be converted to direct current, so as to right The battery charging.
When charging is required, power grid is directly connected to by the rotor of double feedback electric engine, control module controls double feedback electric engine and obtains To power grid alternating current, and double feedback electric engine is made to carry out decompression processing to power grid alternating current, obtains decompression alternating current, that is, by double Generating aid, which is realized, handles the transformation of power grid alternating current, is then converted to direct current for alternating current is depressured by conversion module, with Just it charges the battery, that is, realizes the function of charging pile in the prior art by double feedback electric engine and conversion module, make Electric car can be detached from charging pile and charge the battery, improve the relevance grade of electric car and the convenience of charging.
The application also provides the control method and vehicle of a kind of drive system of electric automobile, has the above beneficial effect, This will not be repeated here.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of drive system of electric automobile provided by the embodiment of the present application；
Fig. 2 is the double feedback electric engine equivalent schematic of drive system of electric automobile provided by the embodiment of the present application；
Fig. 3 is the structural schematic diagram of the control module of drive system of electric automobile provided by the embodiment of the present application；
Fig. 4 is a kind of flow chart of the control method of drive system of electric automobile provided by the embodiment of the present application.
Specific embodiment
The core of the application is to provide a kind of drive system of electric automobile, control method and vehicle, passes through double feedback electric engine 30 realize the transformation processing to power grid alternating current, are then converted to direct current for alternating current is depressured by conversion module 20, so as to It charges to battery 10, that is, realizes the function of charging pile in the prior art by double feedback electric engine 30 and conversion module 20 Can, allow electric car to be detached from charging pile and charge to battery 10, the relevance grade for improving electric car and charging are just Benefit.
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Charging pile must be relied on when charging in the prior art to charge, but the universal density of charging pile does not have much at present Have and reach requirement, user must travel and can may just find workable charging pile after a distance and charge, so that at present The charging link of electric vehicle is inconvenient, and causes developing slowly for electric vehicle.
Therefore, the embodiment of the present application provides a kind of drive system of electric automobile, when charging is required, passes through double feedback electric engine 30 Rotor be directly connected to power grid, control module 40 controls double feedback electric engine 30 and gets power grid alternating current, and keeps double feedback electric engine 30 right Power grid alternating current carries out decompression processing, obtains decompression alternating current, that is, realize to power grid alternating current by double feedback electric engine 30 Then transformation processing is converted to direct current for alternating current is depressured by conversion module 20, to charge to battery 10, also It is the function of realizing charging pile in the prior art by double feedback electric engine 30 and conversion module 20, electric car is detached from Charging pile charges to battery 10, improves the relevance grade of electric car and the convenience of charging.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of drive system of electric automobile provided by the embodiment of the present application.
The system may include:
Battery 10, conversion module 20, double feedback electric engine 30 and control module 40；
When drive system of electric automobile receives driving signal, conversion module 20, for turning the direct current of battery 10 It is changed to driving alternating current, control module 40, for controlling the rotor short-circuit of double feedback electric engine 30, so that double feedback electric engine 30 passes through driving Exchange electric drive automobile；
When the rotor of double feedback electric engine 30 connects power grid, control module 40 is also used to control double feedback electric engine 30 and obtains from power grid Power grid alternating current is taken, handles to obtain decompression alternating current so that double feedback electric engine 30 carries out decompression to power grid alternating current, conversion module 20, It is also used to be depressured alternating current and is converted to direct current and be conveyed to battery 10, to charge to battery 10.
Wherein, battery 10 is the general battery 10 used in electric car, can discharge direct current by battery 10 So that motor rotates, running car is driven.It when charging can be by supplementing electricity to it to its input dc power.It inputs defeated Out be direct current.Therefore three-phase inverter being usually required in existing machine number, the direct current of battery 10 is converted into alternating current To drive three-phase motor, when charging, needs charging pile that three-phase alternating current is converted to direct current and charge to battery 10. But in the prior art to battery 10 carry out charging have to charge by charging pile, and the setting quantity of charging pile and point Cloth can seriously affect the charging experience of electric vehicle.
Wherein, conversion module 20 mainly converts alternating current to direct current, and direct current is converted to alternating current, that is, general Logical AC-DC conversion module 20.
Wherein, power grid mainly provides alternating current to battery 10 in charging, in the prior art mainly to passing through charging pile Direct current is converted alternating current to charge to battery 10.
Mainly by double feedback electric engine 30 in charging in the present embodiment, being directly connected to power grid is equivalent to double feedback electric engine 30 Transforming circuit charges to battery 10 so that the alternating current of power grid is transformed to direct current by conversion module 20.This implementation Double feedback electric engine 30 and control module 40 are also needed in example, and control module 40 controls the circuit of double feedback electric engine 30 so as to by double feedback electric engine 30 realize different circuit function, specifically there is two aspects, are on the one hand to realize driving function in driving, be on the other hand Transformation function is realized when charging.
Specifically, the direct current of battery 10 is converted to driving alternating current by conversion module 20 in driving；Control module 40, For controlling the rotor short-circuit of double feedback electric engine 30, so that double feedback electric engine 30 passes through driving exchange electric drive automobile；
When driving, conversion module 20 is responsible for the direct current of 10 side of battery being converted to alternating current, and alternating current is supplied to Double feedback electric engine 30, so that double feedback electric engine 30 is driven.At this point, control module 40 needs to disconnect double feedback electric engine 30 and power grid, And it will short cut with each other between the rotor of double feedback electric engine 30, so that double feedback electric engine 30 can be rotated by direct current.
In charging, that is, when the rotor of double feedback electric engine 30 is directly connected to power grid, control module 40 is also used to work as and fill Double feedback electric engine 30 is controlled when electric and obtains power grid alternating current from power grid, so that double feedback electric engine 30 carries out decompression processing to power grid alternating current Obtain decompression alternating current；Conversion module 20, is also used to be depressured alternating current and is converted to direct current and be conveyed to battery 10, so as to electricity It charges in pond 10.
Wherein, the mode of the rotor connection power grid of double feedback electric engine 30 has is attached by domestic circuit, that is, will be double The rotor port of generating aid 30 is connect with the electrode of domestic circuit respectively, for example, being directly connected to the three-phase socket in family.It is double The rotor of generating aid 30 can also be attached by power power grid, that is, 380 volts of three phase network, three ends of three phase network It is connect respectively with three ends of rotor, for example, being connect with three-phase socket.
When being charged in the prior art, generally requires charging pile and carry out the alternating current of power grid at decompression and conversion Reason, the direct current for obtaining low pressure are supplied to battery 10, charge.It is control module 40 in the present embodiment by double feedback electric engine 30 Winding be equivalent to transforming circuit, so that alternating current is carried out decompression processing, obtain decompression alternating current.Pass through conversion module 20 again Decompression alternating current is converted into direct current and is conveyed to battery 10, is charged to battery 10.
Specifically, referring to FIG. 2, Fig. 2 is the double feedback electric engine of drive system of electric automobile provided by the embodiment of the present application Equivalent schematic.
The winding of stator is equivalent at L as we know from the figure1Coil and R1Resistance, rotor around son it is equivalent at L2Line Circle and R2Resistance, work as L1Coil be greater than L2Coil when, which can carry out the voltage of power grid at decompression Reason obtains decompression alternating current, to realize the buck functionality in charging pile.Resistance R in 30 equivalent circuit diagram of double feedback electric engine and Inductance L constitutes RL filter, and the equivalent circuit diagram of double feedback electric engine 30 is similar to transformer, as long as therefore reasonably selecting calmly The turn ratio of sub- winding and rotor windings can realize that transformation is handled.For example, by the turn ratio of stator winding and rotor windings It is set as 5:1, the voltage of power grid alternating current can be reduced to 1/5th, battery 10 is carried out after direct current to be converted to Charging.
Also, the RL filter after equivalent can also be filtered power grid alternating current.
Optionally, the control module 40 in the present embodiment can also include mechanical device；Mechanical device, for working as duplex feeding The rotor of machine 30 locks the movable part of double feedback electric engine 30 when connecting power grid, so that double feedback electric engine 30 obtains power grid exchange from power grid Electricity.
Due to when the rotor of double feedback electric engine 30 connects power grid, it is possible to the case where rotation of double feedback electric engine 30 occur, therefore The case where in order to avoid the rotation of double feedback electric engine 30, further includes mechanical device in control module 40, locked when rotor connects power grid The movable part of double feedback electric engine 30, avoids the occurrence of rotation situation, allows double feedback electric engine 30 is stable to obtain power grid from power grid Alternating current.
Optionally, double feedback electric engine 30 carries out decompression to power grid alternating current and handles to obtain decompression alternating current in the present embodiment, can To include:
Double feedback electric engine 30 is filtered power grid alternating current and transformation handles to obtain decompression alternating current.
Optionally, the conversion module 20 in the present embodiment can be Three-Phase PWM Converter.
Optionally, the conversion module 20 in the present embodiment can be rectification adverser.
Optionally, the rectification adverser in a upper optinal plan can be three-phase fully-controlled rectifier.
Optionally, the switch in the present embodiment can be relay.
To sum up, the present embodiment is directly connected to power grid by the rotor of double feedback electric engine 30, and control module 40 controls double feedback electric engine 30 get power grid alternating current, and double feedback electric engine 30 is made to carry out decompression processing to power grid alternating current, obtain decompression alternating current, also It is to realize to handle the transformation of power grid alternating current by double feedback electric engine 30, alternating current conversion then will be depressured by conversion module 20 For direct current, to charge to battery 10, that is, the prior art realized by double feedback electric engine 30 and conversion module 20 The function of middle charging pile allows electric car to be detached from charging pile and charges to battery 10, improves being applicable in for electric car The convenience of degree and charging.
Based on a upper embodiment, the present embodiment does one specifically primarily directed to the control module 40 in a upper embodiment Bright, other parts are substantially the same with a upper embodiment, and same section can refer to a upper embodiment, and this will not be repeated here.
Referring to FIG. 3, the structure that Fig. 3 is the control module of drive system of electric automobile provided by the embodiment of the present application is shown It is intended to.
The module may include:
Controller, first switch S1, second switch S2Until the 5th switch S5；
The first end of rotor respectively with first switch S1One end, third switch S3One end connection, the second end of rotor point Other and first switch S1The other end, second switch S2One end, the 4th switch S4One end connection, rotor third end difference With second switch S2The other end, the 5th switch S5One end connection；Third switch S3The other end, the 4th switch S4It is another End, the 5th switch S5The other end successively connect with the first end of power grid, second end, third end；
Controller, for working as third switch S3, the 4th switch S4, the 5th switch S5When disconnection, first switch S is controlled1With Two switch S2Closure；As third switch S3, the 4th switch S4, the 5th switch S5When closure, first switch S is controlled1And second switch S2It disconnects.
Wherein, third switch S3, the 4th switch S4, the 5th switch S5, mainly double feedback electric engine 30 is attached with power grid Switch, it is contemplated that be in a practical situation and the switch to be not present, that is, there is no entity in the connection relationship of the two Switch, still, there are Guan Kaihe with power grid in the case where driving and charging two states for the rotor of the double feedback electric engine 30 in the present embodiment Therefore two kinds of relationships of closure regard the relationship as between power grid and rotor there are such switches.When third switchs S3, the 4th switch S4, the 5th switch S5When disconnection, that is, rotor is disconnected with power grid, and drive system of electric automobile is answered at this time It should be in driving condition or state to be driven.When being in driving condition or state to be driven, controller controls first switch S1With Second switch S2Closure, that is, by the rotor short-circuit of double feedback electric engine 30, so that double feedback electric engine 30 drives automobile.
As third switch S3, the 4th switch S4, the 5th switch S5When closure, that is, indicate double feedback electric engine 30 rotor with It is connected with each other between power grid, should be charged state at this time.When being in charged state, between the rotor of double feedback electric engine 30 constantly Road, and the state connecting with power grid is kept, so that double feedback electric engine 30 obtains power grid alternating current from power grid.
In the present embodiment, double feedback electric engine 30 is equivalent to by transformer and filter by the switch in control module 40, it should Double feedback electric engine 30 realizes the function of charging pile in the prior art, allows electric car to be detached from charging pile and carries out to battery 10 Charging, improves the relevance grade of electric car and the convenience of charging.
A kind of control method of drive system of electric automobile provided by the embodiments of the present application is introduced below, is hereafter retouched A kind of control method for the drive system of electric automobile stated can be corresponded to each other with a kind of above-described drive system of electric automobile Reference.
Referring to FIG. 4, Fig. 4 is a kind of stream of the control method of drive system of electric automobile provided by the embodiment of the present application Cheng Tu.
The control method is applied to the drive system of electric automobile such as above embodiments；
The control method may include:
S101, when drive system of electric automobile receives driving signal, conversion module is converted to the direct current of battery Alternating current is driven, control module controls the rotor short-circuit of double feedback electric engine, so that double feedback electric engine passes through driving exchange electric drive automobile；
S102, when the rotor of double feedback electric engine connects power grid, control module controls double feedback electric engine and obtains power grid friendship from power grid Galvanic electricity handles to obtain decompression alternating current so that double feedback electric engine carries out decompression to power grid alternating current, and conversion module will be depressured alternating current It is converted to direct current and is conveyed to battery, to charge to battery.
The embodiment of the present application also provides a kind of vehicle, including drive system of electric automobile as described above in Example.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration ?.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered Think beyond scope of the present application.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology In any other form of storage medium well known in field.
Detailed Jie has been carried out to a kind of drive system of electric automobile, control method and vehicle provided herein above It continues.Specific examples are used herein to illustrate the principle and implementation manner of the present application, and the explanation of above embodiments is only It is to be used to help understand the method for this application and its core ideas.It should be pointed out that for those skilled in the art For, under the premise of not departing from the application principle, can also to the application, some improvement and modification can also be carried out, these improve and repair Decorations are also fallen into the protection scope of the claim of this application.

Claims (10)

1.一种电动汽车驱动系统，其特征在于，包括：电池、转换模块、双馈电机以及控制模块；1. an electric vehicle drive system, is characterized in that, comprises: battery, conversion module, doubly-fed motor and control module; 当所述双馈电机的转子连接电网时，所述控制模块，用于控制所述双馈电机从所述电网获取电网交流电，以便所述双馈电机对所述电网交流电进行降压处理得到降压交流电，所述转换模块，用于将所述降压交流电转换为直流电输送给所述电池，以便对所述电池充电。When the rotor of the doubly-fed motor is connected to the power grid, the control module is configured to control the doubly-fed motor to obtain grid alternating current from the grid, so that the doubly-fed motor performs a step-down process on the grid alternating current to obtain a reduced voltage. The voltage alternating current, the conversion module is configured to convert the step-down alternating current into direct current and send it to the battery, so as to charge the battery. 2.根据权利要求1所述的电动汽车驱动系统，其特征在于，当所述电动汽车驱动系统接收到驱动信号时，所述转换模块，还用于将电池的直流电转换为驱动交流电，所述控制模块，还用于控制所述双馈电机的转子短路，以便所述双馈电机通过所述驱动交流电驱动所述汽车。2 . The electric vehicle drive system according to claim 1 , wherein when the electric vehicle drive system receives a drive signal, the conversion module is further configured to convert the direct current of the battery into the drive alternating current, the The control module is further configured to control the short circuit of the rotor of the doubly-fed motor, so that the doubly-fed motor drives the automobile through the driving alternating current. 3.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述控制模块包括：控制器、第一开关、第二开关、第三开关、第四开关以及第五开关；3. The electric vehicle drive system according to claim 1, wherein the control module comprises: a controller, a first switch, a second switch, a third switch, a fourth switch and a fifth switch; 所述转子的第一端分别和所述第一开关的一端、所述第三开关的一端连接，所述转子的第二端分别和所述第一开关的另一端、所述第二开关的一端、所述第四开关的一端连接，所述转子的第三端分别和所述第二开关的另一端、所述第五开关的一端连接；所述第三开关的另一端、所述第四开关的另一端、所述第五开关的另一端依次与所述电网的第一端、第二端、第三端连接；The first end of the rotor is respectively connected to one end of the first switch and one end of the third switch, and the second end of the rotor is respectively connected to the other end of the first switch and the second end of the second switch. one end of the fourth switch is connected to one end of the fourth switch, and the third end of the rotor is connected to the other end of the second switch and one end of the fifth switch respectively; the other end of the third switch is connected to the first The other end of the four switches and the other end of the fifth switch are sequentially connected to the first end, the second end and the third end of the power grid; 所述控制器，用于当所述第三开关、所述第四开关、所述第五开关断开时，控制所述第一开关和所述第二开关闭合；当所述第三开关、所述第四开关、所述第五开关闭合时，控制所述第一开关和所述第二开关断开。The controller is configured to control the first switch and the second switch to close when the third switch, the fourth switch and the fifth switch are open; when the third switch, When the fourth switch and the fifth switch are closed, the first switch and the second switch are controlled to be disconnected. 4.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述控制模块还包括机械装置；所述机械装置，用于当所述双馈电机的转子连接电网时锁定所述双馈电机的活动构件，以使所述双馈电机从所述电网获取所述电网交流电。4 . The electric vehicle drive system according to claim 1 , wherein the control module further comprises a mechanical device; the mechanical device is used to lock the doubly-fed motor when the rotor of the doubly-fed motor is connected to a power grid. 5 . a movable member of the electrical machine to enable the doubly-fed electrical machine to obtain the grid alternating current from the electrical grid. 5.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述双馈电机对所述电网交流电进行降压处理得到降压交流电，包括：5. The electric vehicle drive system according to claim 1, wherein the doubly-fed motor performs step-down processing on the grid alternating current to obtain the step-down alternating current, comprising: 所述双馈电机对所述电网交流电进行滤波处理和变压处理得到所述降压交流电。The DFIG performs filtering processing and voltage transformation processing on the AC power of the grid to obtain the step-down AC power. 6.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述转换模块为三相PWM变换器。6 . The electric vehicle drive system according to claim 1 , wherein the conversion module is a three-phase PWM converter. 7 . 7.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述转换模块为整流逆变器。7. The electric vehicle drive system according to claim 1, wherein the conversion module is a rectifier inverter. 8.根据权利要求1所述的电动汽车驱动系统，其特征在于，所述开关为继电器。8. The electric vehicle drive system according to claim 1, wherein the switch is a relay. 9.一种电动汽车驱动系统的控制方法，其特征在于，应用于如权利要求1至8任一项所述的电动汽车驱动系统；9. A control method for an electric vehicle drive system, characterized in that it is applied to the electric vehicle drive system as claimed in any one of claims 1 to 8; 所述控制方法，包括：The control method includes: 当所述电动汽车驱动系统接收到驱动信号时，所述转换模块将所述电池的直流电转换为驱动交流电，所述控制模块控制所述双馈电机的转子短路，以便所述双馈电机通过所述驱动交流电驱动所述汽车；When the electric vehicle drive system receives a drive signal, the conversion module converts the DC power of the battery into driving AC power, and the control module controls the rotor of the doubly-fed motor to short-circuit, so that the doubly-fed motor can pass through all the the driving alternating current to drive the automobile; 当所述双馈电机的转子连接电网时，所述控制模块控制所述双馈电机从所述电网获取电网交流电，以便所述双馈电机对所述电网交流电进行降压处理得到降压交流电，所述转换模块将所述降压交流电转换为直流电输送给所述电池，以便对所述电池充电。When the rotor of the doubly-fed motor is connected to the power grid, the control module controls the doubly-fed motor to obtain grid alternating current from the grid, so that the doubly-fed motor performs depressurization processing on the grid alternating current to obtain depressurized alternating current, The conversion module converts the step-down alternating current into direct current and transmits it to the battery so as to charge the battery. 10.一种车辆，其特征在于，包括如权利要求1至8任一项所述的电动汽车驱动系统。10. A vehicle, characterized by comprising the electric vehicle drive system according to any one of claims 1 to 8.
CN201811277427.0A 2018-10-30 2018-10-30 A kind of drive system of electric automobile and correlation technique and device Pending CN109455095A (en)

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Application publication date: 20190312